Asymmetric hydrosilylation of ketones catalyzed by complexes formed from trans-diaminocyclohexane-based diamines and diethylzinc
作者:Jadwiga Gajewy、Jacek Gawronski、Marcin Kwit
DOI:10.1007/s00706-012-0754-0
日期:2012.7
Chiral acyclic and macrocyclic amines derived from trans-1,2-diaminocyclohexane in complexes with diethylzinc efficiently catalyze asymmetric hydrosilylation of aryl-alkyl and aryl-aryl ketones with enantiomeric excess of the product up to 86 %. A trianglamine ligand with a cyclic structure or the presence of an additional coordinating group increases the enantioselectivity of the reaction, in comparison
摘要:由反式 1,2-二氨基环己烷衍生的手性无环胺和大环胺与二乙基锌形成络合物,可有效催化芳基烷基酮和芳基芳基酮的不对称氢化硅烷化,产物对映体过量高达 86%。与简单的无环N,N'-二苄基-1,2-二氨基环己烷配体的催化相比,具有环状结构或存在额外配位基团的三胺配体提高了反应的对映选择性。此外,还研究了多种醇和二醇对催化剂不对称活化的影响。图形概要: